Ink-ribbon stop mechanism



Aug., 23,1927. 1,639,746

s. A. Nemici-1 INK RIBBON STOP MECHANISM Filed Aug. 6, 1925 2Sheets-Sheet l Aug. 23,1927. 1,639,746

s. A. NEIDICH INK RIBBON STOP MECHANISM Filed Aug. 6, 1925 42Sheets-Sheet 2 FIGH /A/l/f/VTOR.-

Patented Aug. 23, 1927.

UNITED STATES SAMUEL A. NEIDICH, OF EDGEWAIER PARK, NEW JERSEY.

INK-RIBBON STOP MECHANISM.

Application filed August 6, 1925. Serial No. 48,686.

It is an object and effect of Imy invention to det-ect any defect ormodification in the normal texture of ink ribbons formed of strips oftextile fabric and particularly of the narrow form used in typewritingmachines, and during the operation of winding the same on individualspools, and to indicate when each proper length has been wound. v

Such ribbons are cut from textile fabric woven one yard wide and folded,alternately back and forth, at one yard intervals. -I paint a strip-e,with shellac or glue, across such fabric at intervals of the length ofribbons desired; say twelve yards, and slit the fabric, lengthwise, toform the ribbons, say one half inch wide, and each thus including suchcross marks, which, incidentally, render the fabric abnormally stiff andthick.

The defects include joints between primarily separate lengths of fabric,curly and raveled edges, ,knots andholes; the latter having curlededges, and, ordinarily, detection thereof depends upon the eyes orfingers of the operators. However, I find that all such defectszandmarks increase the normal thickness of the fabric, and I take advantageof that fact to effect the automatic operation of my invention.

In the form of my inventionhereinafter described; I provide two distinctbut cooper-- atively related couples, respectively a pair of parallelfinger bars 'and a pair of parallel rollers, between'which such a ribbonis di'- rected, so that passage of any abnormal portion of such ribbonwith respect to said couples is effective to operate an electric switchto modify an electric circuit including means to'stop the traverse ofthe ribbon and -thus permit the operator to cut it, and eliminate thedefective portion thereof, and 'to make each ribbon of the properlength. In that form ofmy invention; said switches are arranged to closean electric circuit including a tripping device arranged to stop themotor whereby the ribbon is progressed.

My invention includes the various'inovel features of construction andarrangement hereinafter more definitely specified/f AIn said drawings:Fig. I is a plan view of a mechanismv embodying my invention.

Fig. II is an elevation of the right hand side of said mechanism.

vsaid finger bars 11 'and 12.

Fig. III is an eleva-tion of the left hand side of said mechanism. s

Fig. IV is a 'front elevation of said mechanism. Fig. V is a fragmentaryfront elevation of said parallel finger bars.

' Fig.` VI is a fragmentary elevation of said parallel rollers.

In said figures; the base frame 1 is providedwith an adjustable guidefor the ribbon 2, comprising the horizontally extending cylindrical stud3 fixed in and projecting from said frame 1, and the collar 4 which isaxially adjustable on said stud. and provided with the set screw 5 bywhich it may be secured in any desired position of adjustment f inaccordance with the width of the ribbon 2 which is to be tested.Theswing frame 7 is pivoted at its lower end in said base frame 1between thecone pointed bearings 8 and 9- and carries the finger bar 11at its upperv end extending parallel with said guide stud 3. A secondfinger bar, 12, extends parallel with said first bar 11 and above thelatter, as best shown in Figs. II and IV, and said bars are operativelyconnected, so that the upper bar 12 may be raised and lowered inparallel relation with the lower one, by means including two pairs oflinks lff'and 15 pivotally connected at their opposite ends to saidbars, conveniently by rivetsl16 and 17 which gre tight in the links andturn loosely in the ars.

Thespring 19, shown in Fig. III, is connected at its lower end to saidswing frame 7 by the screw 20 and is connected at its upperv end to saidfinger bar 12l by the plate 21 which is held by the screw 22; so `thatsaid upper finger bar is vspring pressed down` wardly to press saidribbon 2 betweensaid bars. Moreover, the spring 24 which, as shown inFig. III, extends from said base frame 1 to sald swing frame 7 isarranged to normally hold said swing 'frame in the position shown in thedrawings, in opposition to the stress of said ribbon 2 passing betweenThe adjustable electric circuit terminal 25 is mounted on said baseframe 1, as shown in Fig: III and arranged to be touched by the springcontact 26 on said swing frame 7 when the latter is `displaced from itsnormal position in the direction of the traverse of tionary roller stud37 projects from said base frame 1 in parallel relation with said guidestud 3 and finger bars 11 and 12 and supports the idle roller 38 whichhas the annular groove 39 and is conveniently provided with the rollerbearing 40 and held thereon by the nut 41 engaging the end of said stud37 so that the said ribbon 2 passes over said roller 38 in the positionindicated.

in Fig. I, II and VI. The bearing bracket 43 is detachably rigidlyconnected with said base frame 1, conveniently bythe screws 44 shown inFig. I, and is provided with cone pointed bearings 45 and 46 forengagement with the roller frame comprising the bell crank lever 48which is thus fulcrumed in said base frame bracket. Said roller framecarries the roller 49 which rotates idly upon the stud 5() which isdetachably fixed in said frame 48, in parallel relation with said roller38. As best shown in Fig. VI; said roller 49 has 'the annular rib flange51 adapted to register in said annular groove 39 in said roller 38, andthe weight of said roller 49 suffices to normally depress it to theposition shown in the drawing wherein, as best 4shown in Fig. VI, itrides intermediately of the width of thenormal ribbon 2, and slightlydepresses it into said groove. However, upon presentation of any of thelength line marks 60 in said ribbon between said rollers 38 and 49, thelatter is lifted. because the normal ribbon is stiffened and thickenedby such marking. Such lifting movement swings said roller frame in thedirection of the arrow marked thereon in Fig. II so as to Ybring itscontact spring 52 into electrical contact with the adjustable terminal53 which is supported by said base frame I but insulated therethrough bybein mounted upon the insulating block 54. aid terminal 53 is includedin said electrical stop circuit by the conductor 56 which leads to saidsource of current 30 and tripping device 31 as indicated in Fig. II; theopposite side of said circuit being. completed through said conductor34, as above described', Therefore, 'it is to be understood that 'saidcircuit is arranged to be closed by movement of either, or both, saidfinger bar swing frame and/said roller frame; whenever a ribbon 2passing between said finger or roller couples pre-A sents a defect ormark increasing the normal stress of the ribbonl upon said `bars or the.normal thickness of the" ribbon. That is to say; said'finger bar frameis arranged to be operated by abnormal stress of the ribbon upon saidfinger bars 11 and l2, in the direction of the length of the ribbon,whereas, said roller frame is arranged to be operated by abnormal stressbetween said rollers in a direction perpendicular to the plane of theribbon; so that said two devices cooperate to detect defects ofrespectively different character. f

Although I have found it convenient to employ the form of my inventionherein shown; it is obvious that various modifications may be madetherein .without departing from the essential features of my inventionas defined in the appended claims.

I claim:

1. In a ribbon stop mechanism, the combination with a base frame; of anadjustable ribbon guide comprising a. stationary stud in said frame, anda collar axially adjustable on said stud; a swing frame pivoted at itsone end in said base frame and carrying a rigid finger bar at its otherend, eX- tending parallel with said guide stud; a loos-e finger barextending parallel with said rigid bar means operatively connecting saidbars for relative movement; a spring connected at one end to said swingframe and at its other end to said loose finger bar and arranged topress a rlbbon between said bars; a spring connecting said base framewith said swing frame, arranged to normally hold thelatterin oppositionto the.

stress of the ribbon `passing between sai/d finger bars; .means formingJan electric circuit ga on said base frame, arranged to be closed bymovement of .said swing frame,

when the latter is displaced from its normal position in the directionvof the traverse of said ribbon betweensaid finger bars; said electriccircuit including a tripping device arranged to stop the traverse ofsaid ribbon;

a stationary roller stud projecting from 'said base frame in parallelrelation with said guide stud and finger bars; an idle roller mounted onsaid roller stud and having an annular groove in its circumference; aroller frame, comprising a lever fulcrumed on said base frame andcarrying a roller in parallel relation with said other roller; saidsecond roller having an annular rib flange adapted to register in theannular groovel in said first roller; means forming another gap in ,saidcircuit lon said base frame and arranged to be closed by movement ofsaid roller frame; whereby, said circuit is arranged to lbe closed bymovement of said finger bars andl swing frame whenever a ribbon passingbetween said bars presents a defect increasing the normal stress of theribbon upon said bars, in the direction of the length of 'saidribbornand said circuit is also arranged to be closed by movement of saldroller frame whenever a ribbon `frame pivoted at its lower end in saidbase frame and carrying a linger bar at its upper end, extendingparallel with said guide stud; a second finger bar extending parallelwith said first bar and above the latter;

means operatively connecting said bars including two pairs of linkspivotally connected at their opposite ends to said bars; a spring'arranged to press said fingers together; a spring 'arranged to normallyhold said swing frame in opposition to the stress of the ribbon passingbetween said finger bars; a circuit closer arranged to be operated bymovement of said swing frame,

when the latter is displaced from its normal position in the directionof the traverse of -i said ribbon between said nger bars; an

electric circuit including said closer and means arranged to stop thetraverse of said ribbon when said circuit is closed; an idle rollermounted on said base frame and having an yannular groove in itscircumference; a roller frame, pivoted on said base frame and carrying aroller in parallel relation with said other roller; said second rollerhaving an annular rib flange adapted to register in the annular grooveinsaid first roller; another circuit closer mounted on said base frameand arranged to be operated by movement of said roller frame; whereby,said circuit is arranged to be closed by movement of said finger barsand swing frame whenever a ribbon passing between said bars presents adefect increasing the normal stress` of the ribbon upon said bars, inthefdirection of thelength of said ribbon, and said circuit is alsoarranged to be closed by movement of saidroller frame whenever a ribbonpassing between said rollers presents .a mark increasing the normalthickness of said ribbon and thereby lifts said anged roller, in adirection .transverse to the length of said ribbon.

3. In a ribbon stop mechanism, the combination with a base frame; of anadjustabley ribbon guide, onsaid frame; a couple of parallel finger barsarranged to direct a ribbon between them; springV means pressing saidfinger bars together upon a ribbon; means supporting said bars forlimited movement 1n the direction of traverse of such ribbon; springmeans arranged to normally hold said bars in opposition to the stressofthe ribbon passing between them;

an electric circuit closer on said base frame" arranged to be operatedby movement of said bars in the dlrection ofthe traverse of said ribbonbetween them; means including said closer in an electric ycircuit withmeans arranged to stop the traverse of said ribbon when said circuit isclosed; a couple of parallel rollers arranged to direct a ribbon betweenthem; another circuit closer mounted on said base frame and arranged tobe operated by relative movement of said rollers; whereby, said circuitis arranged to be closed by movement of said linger bars whenever aribbon passing between said bars presents a defect increasing the normalstress of the ribbon upon said bars, in the direction of the transverseof said ribbon, and said circuit is also arranged to be closed bymovenient' of said rollers whenever a ribbon passing between saidrollers presentsa mark separating said rollers to an abnormal ex'- tent,in a direction transverse to the traverse of said ribbon.

4a In a ribbon stop mechanism, the combination with a base frame; of acouple of parallelnger bars arranged to direct a rib- Y on between them;means supporting said bars for limited movement in the direction oftraverse of such ribbon; spring means arranged to normally hold saidbars in opposition to the stress of the ribbon passing between them; anelectric circuit closed on said base frame arran ed to be operated bymovement of said ars in the direction of the traverse of said ribbonbetween them; and means including said closer in an electric circuitwith means arranged to stop the traverse of said ribbon when saidcircuit is closed by movement of said couple consequent uponpresentation of a defective portion of the ribbon thereat.

5. In a ribbonstop mechanism; the combination with a base frame; of acouple of relatively movabley members arranged to direct a ribbonbetween them. one of said members normally extending within the other ofsaid members; whereby, said ribbon 4ing said closer in an electriccircuit arranged to stop the traverse of said ribbon when vsaid circuitis closed.

' In testimony whereof, I have hereunto signed my name at Burlington,New Jersey, thls twentyv first da of July, 1925.4 f SAU'EL A. NEIDICH.v

CERTIFICATE OF CORRECTION.

Patent No. 1,639, 746. Granted August 23, 192 7, -to

v SAMUEL A. NEIDICH.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiringcorrection as follows: 'In thegrant, title of invention, for the word "Mechanisms" read Mechanism";page 3, line 79, claim l 3, for the word "transverse" read "traverse";same page, line 94, claim 4, for the word "closed" read "closer"; andthat the said Letters Patent should be vread/,with thesecorrectionsthe'rein that the same may conform to the record of the casein Jthe Patent Office.

Signed and sealed this 4th day of October, A. D. i927.

, M. J. Moore, Seal.

Acting Commissioner of Patents.

